Mercurial > hg > xemacs-beta
annotate src/mem-limits.h @ 5927:b58b74274fa2 cygwin
changes from long ago, never committed...
| author | Henry Thompson <ht@markup.co.uk> |
|---|---|
| date | Wed, 15 Dec 2021 19:02:33 +0000 |
| parents | 308d34e9f07d |
| children | e2fae7783046 |
| rev | line source |
|---|---|
| 428 | 1 /* Includes for memory limit warnings. |
| 2 Copyright (C) 1990, 1992, 1993, 1994, 1995 Free Software Foundation, Inc. | |
| 3 | |
| 4 This file is part of XEmacs. | |
| 5 | |
|
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6 XEmacs is free software: you can redistribute it and/or modify it |
| 428 | 7 under the terms of the GNU General Public License as published by the |
|
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8 Free Software Foundation, either version 3 of the License, or (at your |
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308d34e9f07d
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changeset
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9 option) any later version. |
| 428 | 10 |
| 11 XEmacs is distributed in the hope that it will be useful, but WITHOUT | |
| 12 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 13 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 14 for more details. | |
| 15 | |
| 16 You should have received a copy of the GNU General Public License | |
|
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parents:
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changeset
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17 along with XEmacs. If not, see <http://www.gnu.org/licenses/>. */ |
| 428 | 18 |
| 19 /* Synched up with: FSF 19.30. */ | |
| 20 | |
| 2263 | 21 /* Subsequently cleaned up and reorganised, made to use configure. */ |
| 428 | 22 |
| 440 | 23 #ifndef INCLUDED_mem_limits_h_ |
| 24 #define INCLUDED_mem_limits_h_ | |
| 428 | 25 |
| 26 #ifdef HAVE_CONFIG_H | |
| 27 #include <config.h> | |
| 28 #endif | |
| 29 | |
| 30 #ifdef HAVE_ULIMIT_H | |
| 31 #include <ulimit.h> | |
| 32 #endif | |
| 33 | |
| 2263 | 34 #ifdef HAVE_SYS_RESOURCE_H |
| 35 /* Some systems need either sys/types.h or sys/time.h before <sys/resource.h>. */ | |
| 428 | 36 #include <sys/types.h> |
| 2263 | 37 #include <sys/time.h> |
| 38 #include <sys/resource.h> | |
| 39 #endif | |
| 40 | |
| 41 #ifdef HAVE_SYS_VLIMIT_H | |
| 42 #include <sys/vlimit.h> | |
| 43 #endif | |
| 428 | 44 |
| 45 #ifdef _LIBC | |
| 46 | |
| 47 /* Old Linux startup code won't define __data_start. */ | |
| 48 extern int etext, __data_start; weak_symbol (__data_start) | |
| 49 #define start_of_data() (&__data_start ?: &etext) | |
| 50 | |
| 51 #else /* not GNU libc */ | |
| 52 | |
| 53 #ifdef emacs | |
| 54 typedef void *POINTER; | |
| 55 | |
| 442 | 56 #ifndef CYGWIN |
| 428 | 57 typedef unsigned long SIZE; |
| 58 #endif | |
| 59 | |
| 60 extern POINTER start_of_data (void); | |
| 61 #define EXCEEDS_LISP_PTR(ptr) 0 | |
| 62 | |
| 63 #ifdef BSD | |
| 64 extern int etext; | |
| 65 #define start_of_data() &etext | |
| 66 #endif | |
| 67 | |
| 68 #else /* not emacs */ | |
| 69 extern char etext; | |
| 70 #define start_of_data() &etext | |
| 71 #endif /* not emacs */ | |
| 72 | |
| 73 #endif /* not _LIBC */ | |
| 74 | |
| 75 | |
| 76 | |
| 77 /* start of data space; can be changed by calling malloc_init */ | |
| 78 static POINTER data_space_start; | |
| 79 | |
| 80 /* Number of bytes of writable memory we can expect to be able to get */ | |
| 2132 | 81 extern unsigned long lim_data; |
| 428 | 82 |
| 2263 | 83 /* The implementation of get_lim_data() is very machine dependent. */ |
| 84 | |
| 442 | 85 #if defined (HEAP_IN_DATA) && !defined(PDUMP) |
| 428 | 86 extern unsigned long static_heap_size; |
| 1632 | 87 extern MODULE_API int initialized; |
| 2263 | 88 |
| 428 | 89 static void |
| 90 get_lim_data (void) | |
| 91 { | |
| 92 if (!initialized) | |
| 93 { | |
| 2132 | 94 lim_data = (unsigned long) -1; /* static_heap_size; */ |
| 428 | 95 } |
| 96 else | |
| 97 { | |
| 2132 | 98 lim_data = (unsigned long) -1; |
| 428 | 99 } |
| 100 } | |
| 2263 | 101 |
| 102 #elif defined(NO_LIM_DATA) | |
| 103 | |
| 428 | 104 static void |
| 105 get_lim_data (void) | |
| 106 { | |
| 2132 | 107 lim_data = (unsigned long) -1; |
| 428 | 108 } |
| 2263 | 109 |
| 110 #elif defined(HAVE_GETRLIMIT) | |
| 111 | |
| 112 static void | |
| 113 get_lim_data (void) | |
| 114 { | |
| 115 struct rlimit XXrlimit; | |
| 428 | 116 |
| 2263 | 117 getrlimit (RLIMIT_DATA, &XXrlimit); |
| 118 #ifdef RLIM_INFINITY | |
| 119 lim_data = XXrlimit.rlim_cur & RLIM_INFINITY; /* soft limit */ | |
| 120 #else | |
| 121 lim_data = XXrlimit.rlim_cur; /* soft limit */ | |
| 122 #endif | |
| 123 } | |
| 124 | |
| 125 #elif defined(HAVE_ULIMIT) | |
| 428 | 126 |
| 127 static void | |
| 128 get_lim_data (void) | |
| 129 { | |
| 2132 | 130 lim_data = (unsigned long) -1; |
| 428 | 131 |
| 132 /* Use the ulimit call, if we seem to have it. */ | |
| 2132 | 133 #if !defined (ULIMIT_BREAK_VALUE) |
| 428 | 134 lim_data = ulimit (3, 0); |
| 135 #endif | |
| 136 | |
| 137 /* If that didn't work, just use the macro's value. */ | |
| 138 #ifdef ULIMIT_BREAK_VALUE | |
| 2132 | 139 if (lim_data == (unsigned long) -1) |
| 428 | 140 lim_data = ULIMIT_BREAK_VALUE; |
| 141 #endif | |
| 142 | |
| 143 lim_data -= (long) data_space_start; | |
| 144 } | |
| 145 | |
| 2263 | 146 #elif defined(WIN32_NATIVE) |
| 428 | 147 |
| 148 static void | |
| 149 get_lim_data (void) | |
| 150 { | |
| 151 extern unsigned long data_region_size; | |
| 152 lim_data = data_region_size; | |
| 153 } | |
| 154 | |
| 2263 | 155 #elif defined(HAVE_VLIMIT) |
| 428 | 156 |
| 157 static void | |
| 158 get_lim_data (void) | |
| 159 { | |
| 160 lim_data = vlimit (LIM_DATA, -1); | |
| 161 } | |
| 162 | |
| 163 #else | |
| 2263 | 164 #error Cannot determine an implementation of get_lim_data(). |
| 165 #endif /* not HAVE_VLIMIT */ | |
| 428 | 166 |
| 440 | 167 #endif /* INCLUDED_mem_limits_h_ */ |